AFP

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alpha

 [al´fah]
the first letter of the Greek alphabet, α; used to denote the first position in a classification system; as, in names of chemical compounds, to distinguish the first in a series of isomers, or to indicate the position of substituent atoms or groups; also used to distinguish types of radioactive decay, brain waves or rhythms, adrenergic receptors, and secretory cells that stain with acid dyes, such as the alpha cells of the pancreas.
alpha-adrenergic blocking agent (alpha-blocker) (alpha-blocking agent) any of a group of drugs that selectively inhibit the activity of alpha receptors in the sympathetic nervous system. As with beta-adrenergic blocking agents, alpha-blocking agents compete with the catecholamines at peripheral autonomic receptor sites. This group includes ergot and its derivatives, and phentolamine.
alpha chain disease the most common heavy chain disease, occurring predominantly in young adults in the Mediterranean area, and characterized by plasma cell infiltration of the lamina propria of the small intestine resulting in malabsorption with diarrhea, abdominal pain, and weight loss, or, exceedingly rarely, by pulmonary involvement. The gastrointestinal form is immunoproliferative small intestine disease.
alpha-fetoprotein (AFP) a plasma protein produced by the fetal liver, yolk sac, and gastrointestinal tract and also by hepatocellular carcinoma, germ cell neoplasms, and other cancers in adults; elevated levels may also be seen in benign liver disease such as cirrhosis and viral hepatitis. The serum AFP level is used to monitor the effectiveness of cancer treatment.

During pregnancy some AFP crosses from the amniotic fluid to the mother's blood. If the fetus has a neural tube defect, large amounts of AFP will be found in the amniotic fluid and maternal blood. Blood screening tests for serum AFP can thus be done as a first step in the screening process; if test results are positive, further testing is indicated to diagnose the defect.
alpha particles a type of emission produced by the disintegration of a radioactive substance. The atoms of radioactive elements such as uranium and radium are very unstable, continuously breaking apart with explosive violence and emitting particulate and nonparticulate types of radiation. The alpha particles, consisting of two protons and two neutrons, have an electrical charge and form streams of tremendous energy when they are released from the disintegrating atoms. These streams of energy (alpha rays) can be used in treatment of various malignancies. See also radiation and radiation therapy.

AFP

Abbreviation for α-fetoproteins. See: fetoproteins.

AFP

alpha fetoprotein.

AFP

abbr.
alpha-fetoprotein

AFP

abbreviation for alpha-fetoprotein.

AFP

A gene on chromosome 4q11-q13 that encodes alpha-fetoprotein, a major plasma protein produced by the yolk sac and the liver during foetal life. AFP is regarded as the foetal counterpart of serum albumin and binds copper, nickel, fatty acids and bilirubin; hereditary persistance of alpha-fetoprotein may be found in individuals with no obvious pathology.

Molecular pathology
AFP is elevated in foetuses with neural tube defects, including spina bifida and anencephaly. It is elevated in adults with hepatocellular carcinomas and germ cell tumours.

AFP

α-fetoprotein, see there.

AFP

Abbreviation for alpha(α) fetoprotein test.

AFP (Alpha-fetoprotein)

A tumor marker associated with liver, testicular, and ovarian cancer.
Mentioned in: Tumor Markers

AFP

alpha-fetoprotein.
References in periodicals archive ?
Network file sharing provides many benefits and CIFS is the most widely deployed and most cross platform friendly of all available file sharing protocols.
However, limiting NAS functionality to only file sharing protocol support will compromise the level of data sharing and the administrative simplicity of the device because that device will not be able to distinguish and support important file system-level, data sharing features.
Merely supporting the CIFS/SMB and NFS file sharing protocols limits the level of transparency for supporting NT and Unix data and, accordingly, the level of data sharing that can be achieved.
Today's announcement is designed to strengthen our collaboration with Microsoft, and to further integrate our Windows-based and multiprotocol network attached storage products (NAS) with Microsoft's CIFS file sharing protocol.
All major file sharing protocols, including NFS (Network Filesystem for Unix/Linux environments), CIFS (Common Internet Filesystem for Windows environments), and IPX/SPX (Internetwork Packet Exchange/Sequenced Packet Exchange for Novell environments) were designed for LAN environments where clients and servers were located in the same building or campus.
Cross-platform file sharing for Linux, Windows, Mac and Unix, as well as support for all major file sharing protocols (NFS & CIFS)
The first-time set-up wizard makes it simple to connect to the network, join a domain, add users, create shares and select file sharing protocols.
In contrast, Network Attached Storage (NAS) uses standard file sharing protocols (NFS, CIFS, HTTP) accessed over a standard TCP/IP network.
NAS subsystems utilize network file sharing protocols to transport data on an Ethernet storage network.
Supports multiple network platform file sharing protocols (NFS for Unix and CIFS for Windows).
In addition to dramatically reducing the networking costs resulting from the explosive growth of file sharing protocols like FastTrack (KaZaA), Sandvine's network equipment for broadband ISPs will now control traffic originating from both Bittorrent and Direct Connect, emerging P2P programmes that are growing in popularity.
NFS and other networked file sharing protocols get around this problem by talking to the remote system's file manager and not directly to the disk drive.